Seedling emergence in Schizolobium amazonicum Huber ex Ducke (Caesalpinaceae) in different substrates and shading

Schizolobium amazonicum is a specie from Amazonian forest intensively used in reforestation programs, both because it is fast growing and for good behavior in homogeneous planting. The objective was to evaluate the influence of substrates and shading on emergency and development of parica seedlings. The experimental design was completely randomized with four replications in a factorial 2 x 10 (shading and substrates). The substrates used were commercial coir and composted soil, mixed with alternative materials rice hulls, sand, sawdust and fresh sawdust tanned. Were evaluated seedlings emergence, speed of emergence index, length of roots and hypocotyl, dry matter of roots and hypocotyls, relative frequency and average time of emergency. Sand and dust tanned mountain in mixture (1:1 v / v) with coconut shell or topsoil can be used for Schizolobium amazonicum seedlings formation. Sand and fresh mountain powder can be used in the initial nursery, but seedlings should be transplanted to another substrate or field after 40 days. Rice husk in nature should not be adopted either as a substrate, neat or in mixture. Production of parica seedlings does not require shading.

Lighting; Forest seedlings; Seeds; Vigour